Skimming through my copy of Motorsport magazine I looked apon a car i'd totally forgotten about, this car was the Citroen BX 4TC EVOLUTION. A group B monster which sadly for Citroen BX was something of a flop... Anyway on reading this there were five prototypes, it states all used variations of Peugeot's X5N2 engine, one with a 2.5 motor and another stated as a 2.2 turbo engine producing 405BHP. It also later states it was based on a 1970 simca design of iron block, alloy head, a single overhead camshaft and just eight valves. I've heard that the the 205 rally car used a 2.2 murena engine with a complicated special 16 valve head, could it be that this BX a Murena engine? Anyone know anymore about this car/engine?

HiThe Citroen BX 4TC EVOLUTION used the 505 turbo engine i.e. the N9TE engine which has roots back to the Simca/ Chrysler 180, Talbot Tagore engine and thereby to the Murena 2.2.For track race the final development stage of the 505 Turbo the engineering copany Danielson managed to squish 575 HP out of the engine I have no idea of the expected running hours for that 575 hp Danielson engine, but I guess that it had to be overhauled quit often.

B X 4 T C, 4 T C E V O, with N9TE engine The BX 4TC Evo was Citroën's weapon for the B-group World Rally Championship. The 4TC Evolution was classified with a 4TC (a series of 200 cars). The car was officially launched by Citroen in November 1985 ment for he World Rally Championship season 1986. The 4TC was far from similar to normal BX's, and the 4TC Evolution was far from similar to the 4TC street version. The last Evo version had a number of radiators in the back and a different turbo (KKK). The first Evolution version had 6 round headlights and this version was only tested before the final version was created. Both types (evo and street version) had the hydropneumatic suspension. Transmission was borrowed from the SM and brakes from the CX. The nose of the 4TC was a lot longer then the normal BX because a 4 cylinder 2 litre engine had to be rotated by 90 degrees compared with the normal BX-engine. The 4TC was a fast and very luxurious car. The interior (for 5 passengers) was similar to the yet to be launched BX Sport, including the steering wheel. On the dashboard a few additional gauges (for example engine temperature indicator) were added. Bonnet, tailgate and all the wings are plastic in both versions. 4TC's have six head lights and 210/55 VR 390 tyres on 150 TR 380 FH alloy wheels. The last Evo versions had only 2 small headlights to permit as much cooling area as possible in front of the car. Link: Public BX 4TC register of CitSportSite Two BX-4TC-200 series cars were displayed at the ICCCR - 98 meeting held in Belgium. Both cars were in very good shape (as new) and completely original. BX-SPORT owner Robbert Bakker toke some very nice pictures of these cars which can be found below. On these pictures it is clear that the car has a very huge nose and the front and rearbumpers have much in common with those used on the BX SPORT. One of the cars was noticed by Robbert Bakker during arrival and Robbert mentioned that its sound was incredible.

1985 Citroën BX 4TCPrice: (estimated) £10,000-£14,000From: Les Grandes Marques à Monaco - a Bonhams auction (www.bonhams.com - lot 207) In 16-valve trim, the Citroën BX remains one of the world's least celebrated supercars: light, spacious, sharp and very fast. But while it might have been the best BX bar none, it is neither the fastest nor the rarest. That honour falls to the BX 4TC, of which just 200 were built to legitimize Citroën's attempt to become a World Rally Championship force in the mid-1980s.Its 2.2-litre, four-cylinder engine generated 300bhp, but the chassis was about as nimble as a giraffe on water skis. Bonhams, which is auctioning the car in Monaco on Monday, claims the BX 4TC "had the potential to be competitive, but the banning of Group B supercars at the end of 1986 left insufficient time for development and the car was retired after just one season".

Anybody who was there, however, will tell you a more prosaic truth: It was simply rubbish.

This example was a gift from Citroën to French racing driver Jean-Pierre Beltoise, the last man to score a grand prix victory in a BRM, at Monaco in 1972. Never officially registered, it is part of a well-preserved private collection that Beltoise has decided to sell. It has been fired up on a regular basis in the past 20 years, but has covered only 180km (110 miles).He might have done rather more if they'd given him a BX 16v.